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Finding the Fourth Proportional to 3,663.96, 5,490.48 and 3,390.60

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Solution

The fourth proportional to 3,663.96, 5,490.48 and 3,390.60 is: 5,080.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,663.96 : 5,490.48 = 3,390.60 : x
  2. Step 2: Convert to fraction form
    3,663.96/5,490.48 = 3,390.60/x
  3. Step 3: Cross multiply
    3,663.96x = 5,490.48 × 3,390.60
  4. Step 4: Simplify right side
    3,663.96x = 18,616,021.49
  5. Step 5: Solve for x
    x = 18,616,021.49/3,663.96
  6. Step 6: Final answer
    x = 5,080.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.